Silly question, I assume the colonial units had there own artillery. Did they have the same uniform as the colonial infantry? Were they organized the same as the regular artillery?
I've only found this tiny reference in L&F Funcken.
Collar Patch
Numbers
Braid
Field Artillery (mounted)
Scarlet
Sky blue
Sky blue
Foot Artillery
Scarlet
Green
Green
Heavy Artillery
Scarlet
Charcoal grey
Charcoal grey
Mountain Artillery
Scarlet
White
White
Colonial Artillery
Scarlet
Violet
Violet
That's it, I'm afraid. Nothing about organisation, deployment, guns, or anything. The collar patches were on the greatcoat and tunic, with regimental number and the appropriate symbol in the relevant contrasting colour, but there's no info on what the symbols were. Since all French colonial forces (except the Foreign Legion) adopted horizon blue in Europe, it's reasonable to assume that the artillery did so, but whether they remained separate units, I can't say.
Here's a bit more. If you can do a bit of French, these will help:
"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
In the decade or so prior to World War I, the Troupes Coloniales fielded infantry and artillery regiments, as well as medical and administrative services, but neither engineer nor cavalry units.
The infantry regiments were either of the European (régiments d'infanterie coloniale) or native (régiments de tirailleurs) variety. The artillery regiments, which were entirely European, contained varied mixtures of field, mountan and garrison (i.e. coast defense or fortress) batteries.
Some of these regiments (both European and native) served overseas. Others (all of which were European) were assigned to the Corps d'Armée Coloniale, which served both as a strategic reserve for the French Empire as a whole and, in case of a European war, provided one of the component army corps of the French field army in France, as well as a variety of individual regimetns and brigades.
The Troupes Coloniales should not be confused with the Armée d'Afrique, which was raised and stationed in Algeria and Tunisia. Zouaves, spahis and 'turcos' (tirailleurs algériens) were part of the Armée d'Afrique. All other types of tirailleurs (tirailleurs sénégalais, malgaches, etc.) were part of the Troupes Coloniales.